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Patrick G. Ryan is the billionaire founder and retired executive chairman of Aon Corporation, the largest reinsurance broker in the world. In 2011, Aon was ranked as the largest insurance broker in the world based on revenue. As of 2012, Aon is the principal sponsor of the Premier League team Manchester UnitedHe served as the Chairman and CEO of the Chicago 2016 Olympic bid committee. Following the unsuccessful 2016 Chicago bid, he founded Ryan Specialty Group (RSG) as a holding company aimed at providing specialty services to insurance brokers, agents and carriers. He is also a leading benefactor of the Art Institute of Chicago Building's Modern wing addition.

In 2004, Ryan hosted President George W. Bush during a political fundraising dinner at his home in Winnetka, Illinois. Later that year, he hosted another fundraiser with President Bush's wife and daughters as special guests. In November 2008, Ryan was named one of five co-chairs for Barack Obama's inaugural committee. Ryan is a member and former Chairman of the Board of Trustees at Northwestern University, where both major athletic facilities, the Welsh-Ryan Arena and Ryan Field, are named after him. In 1990, he bought 10% of the Chicago Bears.

Patrick G. Ryan is the billionaire founder and retired executive chairman of Aon Corporation, the largest reinsurance broker in the world. In 2011, Aon was ranked as the largest insurance broker in the world based on revenue. As of 2012, Aon is the principal sponsor of the Premier League team Manchester UnitedHe served as the Chairman and CEO of the Chicago 2016 Olympic bid committee. Following the unsuccessful 2016 Chicago bid, he founded Ryan Specialty Group (RSG) as a holding company aimed at providing specialty services to insurance brokers, agents and carriers. He is also a leading benefactor of the Art Institute of Chicago Building's Modern wing addition.

In 2004, Ryan hosted President George W. Bush during a political fundraising dinner at his home in Winnetka, Illinois. Later that year, he hosted another fundraiser with President Bush's wife and daughters as special guests. In November 2008, Ryan was named one of five co-chairs for Barack Obama's inaugural committee. Ryan is a member and former Chairman of the Board of Trustees at Northwestern University, where both major athletic facilities, the Welsh-Ryan Arena and Ryan Field, are named after him. In 1990, he bought 10% of the Chicago Bears.